Combined steam superheater and draft-distributing deflector



April 21,1925. 1,534,402"

T. LARREY ET AL COMBINED STEAM SUPERHEATER AND DRAFT DISTRIBUTINGDEFLECTOR Filed April 16, 1925 5 Sheetsiafh e et 1 O 0 0O 00 O G O 0 O OG G 30 G O April 21, 1925. 1,534,402

I T. LARREY- ET AL' COMBINED STEAM SUPERHEATER AND DRAFT DISTRIBUTINEDEFLECTOR Filed April 16,1925 5 Sheet s S k 1 eet 2 jkadaz'a lai'rey, vZuz'sz'adard,

April 21, 1925. 1,534,402

T. LARREY ET AL COMBINED STEAM SUPERHEATER AND DRAFT DISTRIBUTINGDEFLECTQR Filed April 16, 1923 3 sheetg -jzfl'geet 3 "a & k

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Patented Apr. 21, 1925 v um'r so STATES PATENT OFFICE...

riion no LABREY ND LUIS semen. or Mexico our, amuse COMBINED STEAMsurnitiinnrnn Ann nitiir'r-nisrniiwrrne rinrnnerort.

Application filed April 16, 1923. Serial No. 632,484.

To all whom it may concern: a i

Be known that we, TEDDORO LAiumr and 7 Luis GODARD, citizens of theUnite'dMexican States, residing. at Mexico City, Mexico,

have invented certain new and useful Improvements in Combined SteamSuperheaters and Draft-Distributing Deflectors, of whichthe following isaspecifioation.

The present invention relates to combined steam siiperheaters and draftdistributing deflectors for boilers, and is essentially an improvementon, or development of, the con- 1,441,360, granted January 9,1928, andour structions disclosed in our prior patent, No.

pending application, No. 309,550, filed July 9, 1919; the precisefeatures constituting the iniproveinents in question being hereinafterfully set forth.

The invention is specially Well adapted for application to, orinstallation in, steam locomotives, though it is obviously not limitedto that particular use; and when so used, it results in asavingof bothwater and fuel consumption, an increase in the life of the fire-box,tube sheets and tubes, and a re:

ductionin the number of broken stay bolts and of boiler failures, Whileat the same time providing forsuiiicient superheating of the steam tomore than offset any condensation throughout the expansion period of thesteam in the cylinders. '11 also aims to provide greater locomotiveefficiency, due to increased steam capacity of the boiler as a result ofproper draft distribution and the high quality of steam delivered to thecylinders by the absorption of Waste heat instead of useful heat forsteam generation, asin.

the case of fire-tube superlieaters.

The invention further resides in the-provision of an extremely simpleand comparativelyinexpensive device of the character above describedwhich may be readily in stalled in a locomotive in much less time than afire-tube superheater, thereby greatly reducing the period during whichthe locomotive must remain in the shop.

With the above and other objects in View, the, invention involves theparticular construction and arrangement of parts hereinafter describedand claimed, though it is to be understood as susceptible ofmodifications and changes within its scope as so claimed.

In the accompanying drawings:

Figures 1 and are, respectivel a front elevation and a part-sectionalside elevation of one embodiment of the invention.

spectively.

Figs. and 6 are vertical sections taken, V respectively, on line5-5,'Fig. 3- and line Figs. 7 and 8 areviews, corresponding to" Figs. 1and 2, of a slightly modified form of theinvention. I i

Figs. 9 and 10 are front elevations of one of the deflector members andits internal division plate in said modification.

Figs. 1.1 and 12 are vertical sections on lines ills-i1 and 12 12 ofFigs 9 and 10, Peel spectively.

Fig. 13 is an enlarged vertical sectional view of a conoavo-conveirdeflector which may be substituted for the flatdeflectors of Figs. 2 and8.. y r c In the above figures, the invention has been shown as appliedto a locomotive boiler which, as previously stated,isits principal use;but it will be a parent: that the inven tion may also be applied tomarine and stationary boilers of various forms, as well as to other anddifferent types of boilers and to still other uses. 7 Hence, the preciseapplication of the invention here illustrated has of itself no limitingaction. 2

Referring to Figs. 1-6, 1 indicates the shello-f the boiler of alocomotive of standard orconventional type, 2 the smoke-box thereof, theflue tubes passing through the boiler, and 4 the front tube sheet towhich theforward ends of the tubes are attached and through which theyopen. The smoke stack of thelocomotive is indicated at 5, and the drypipe of the boiler at 6, all of which parts are, or may be, of the usualforin.

' The improved supei-"heating deflector 7 is located in the smoke-box 2a slight distance in front of the tube sheet 4; and, as here shown, hasa straight, horizontal top edge and curved side and bottom edges' whichgenerally conform to the curvature of the boiler shell 1. but are spacedtherefrom, While the upper corners are rounded, so that the device as awhole presents a substantially heart-shaped appearance. It preferablyconsists of two counterpart hollow members 7*, the mutually adjacentvertical inner edge faces of which are fastened together by pairs ofalining straps or lugs 8 soldered'tothe front faces of said n'ie nbersand bolted or otherwise secured to each other as indicated at 9. The twomembers are connected to the dry pipe 6 by individual inlet pipes 10branching thereto, from said pipe; the delivery end of each inlet pipehaving a coupling flange 11 which is bolted to a similar coupling flange12 and to an apertured circular boss 13 formed on a division plate 14disposed within the deflector member 7 The division plate 14 is arranged1n spaced relation to the front and rear walls of the'deflector member,as shown in Fig. 5, and is held'in place by means of a multitude ofsmall stay bolts 15 carrying spacing sleeves 16. It conforms to theinternal shape of the deflector member, and thus divides the interior ofsaid member into counterpart front and rear chambers or conduits,communication between which is provided by a marginal space or passage17 at the edge of the plate, interrupted at intervals by projectingcentering lugs 18. The boss or shoulder 13 is located in the upperportion of the division plate and projects forwardly therefrom, asrepresented in Figs. 4 and 6, so as to abut directly against the frontwall of the deflector member (Fig. 5), which latter is cut away at thatpoint to permit the outward projection of the annular part of thecoupling 12. A second circular boss or shoulder 19 is formed in thelower portion of the division plate, but is imperforate instead ofapertured and projects rearwardly instead of forwardly into directabuttingrelation with the rear wall of the deflector member; said walland boss being dished slightly inward and interfltted. The front wall ofthe deflector member is cut away directly opposite the boss 19, and acoupling 20 is fastened thereto and connected to a second coupling 21 onthe adjacent end of an outlet pipe 22, the latter being connected to thepipe or passage 23 which conducts the'dry superheated steam to theengine cylinders. The joints between the various couplings are madetight to prevent escape of steam, as will be understood.

As in our patented construction, previously referred to, the presentsuperheating deflector has its periphery coinciding with the peripheraltubes in the tube sheet, so that the area of the surface of thedeflector confronting said tubes is substantially equal to the area ofthe tube zone of the tube sheet; from which it follows that the productsof combustion emerging from the tubes will discharge radially over theentire confronting surface of the deflector, and the draft in each tubewill be substantially equal to the draft in every other tube.

Due to the construction and arrangement of parts as above described, thesaturated steam coming from the pipe 6 will flow into and through theinlet pipes 10 and thence through the apertures in the upper bosses 13on the division plates 14 directly into the rear chambers or conduits ofthe deflector members, where it will spread out radially in alldirections, forming relatively thin layers which completely fill saidchambers and which will readily and quickly be superheated by the flamesand hot gases of combustion coming from the flue tubes and impingingagainst the deflector. From the aforesaid rear chambers or conduits, thesuperheated steam will pass forwardly all around the edges of thedivision plates and through the marginal passages 17 into the frontchambers or conduits of the deflector members, whence it will passoutwardly through the pipes 22 and will be supplied in superheatedcondition to the engine cylinders through the parts 23.

The construction illustrated in Figs. 7 to 12 differs from thatpreviously described only in certain details; and therefore the samenumerals have been used as appear in Figs. 1 to 6, wherever possible, inorder to avoid unnecessary description. In the modified form, the pipe 6is connected directly to the parts 23 which supply the superheated steamto the cylinders by means of a pair of oppositely curved pipes 2 1; theseparate inlet and outlet pipes 10 and 22 being omitted, and theirplaces taken by small pipes 10 and 22 which lead, respectively, from theupper portions of pipes 2 1 to the upper parts of the deflector members7*, and from the lower parts of said members back to the lower portionsof pipes 2 1. The deflector 7' is here shown as suspended from the tubesheet 1 by a series of brackets 25 or the like, and the outer ends ofthe pipes 10 and 22 are fastened to couplings 12 and 20 (Figs. 9 and 11)which are welded on the front face of the deflector. These couplings 12and 20 are disposed immediately opposite the upper and lower bosses 13and 19 formed on the division plates 1 1 (Figs. 10 and 12); said bossesprojecting laterally into direct abutting relation to the front and rearwalls of the deflector members, and the upper bosses being centrallyapertured, as in the first forrm The operation is substantiallyidentical with that previously described and, hence, need not berepeated.

The further modification, represented in Fig. 13, shows a form ofsuperheat-ing deflector, the members 7 which are of bowed orconcave-convex construction, but are otherwise similar to those shown inFigs. 10 to 12, the operation being likewise the same. The correspondingparts are indi cated by the same reference numerals with the addition ofthe exponent 2, and the couplings are omitted, the showing beingsomewhat diagrammatic.

We claim as our invention 1. A steam superheater for boilers, comprisinga hollow case dividing means in said case spaced from the front and rearwalls thereof/to form separate front and rear steam conduits orchambers, said dividing means being marginally spaced from theperipheral wall of the case to provide a communication passage betweenthe chamtill bers thereof; piping for supplying saturated steam from theboiler to one chamber; and plping leading from the other chamber todeliver the superheated steam from the munication passage between saidchambers;

the front wall of the case having inlet means for saturated steam andseparate outlet means for superheated steam, and the division platehaving means coacting with said inlet means for conducting the in-comingsaturated steam immediately into the rear chamber; piping connected withthe inlet means for supplying the saturated steam thereto; and pipingconnected with the outlet means for delivering the superheated steamfrom the case for use.

3. In a boiler, the combination of a smoke-box; flue tubes passingthrough the boiler and terminating at their forward ends in a tube sheetin the smoke-box; a combined steam superheater and deflector located inthe smoke-box adjacent the tube sheet and having its peripherycoinciding with the peripheral tubes in the tube sheet, whereby the areaof the surface of the deflector confronting said tubes is substantiallyequal to the area of the tube zone of the tube sheet so that theproducts of combustion discharge radiallyover the entire confrontingsurface of the deflector; said deflector comprising a hollow case havingwithin it a division plate which is spaced from the front and rear wallsthereof to form separate front and rear steam conduits or chambers, andwhich has its marginal edge spaced from the peripheral wall of the caseto provide a communication passage between said chambers; piping forsupplying saturated steam from the boiler directly to the rear chamberto be superheated by the products of combustion impinging upon thedeflector; and piping communicating with the front chamber to conductthe superheated steam therefrom for use.

i. In a boiler, the combination of a smoke-box; flue tubes passingthrough the boiler and terminating at their forward ends in a tube sheetin the smoke-box; a combined steam superheater and deflector located inthe smoke-box adjacent the tube sheet; said deflector comprising ahollow case having within it a division plate which is spaced from thefront and rear walls thereof to form separate front and rear steamconduits or chambers, and which has its mar ginal edge spaced from theperipheral wall of the case to provide a communication passage betweensaid chambers; piping for supplying saturated steam from the boilerdirectly to the rear chamber to be super-- heated by the products ofcombustion impinging upon the deflector; and piping communicating withthefrontchamber to conduct the superheated steam therefrom for use. a l

5. A steam superheater for boilers, comprising a hollow case; a divisionplate in the case spaced from the front and rear walls thereof to formseparate front and. rear steam conduits or chambers, said chambershaving a communication passage between them at the margin of the plate;an

apertured boss projecting outward from the front wall of the case; aboss projecting forward from the front face of said plate into abuttingengagement with the said front case wall directly opposite thefirst-named boss and having an aperture in registration with theaperture therein; piping communicating with said bosses for supplyingsat urated steam therethrough from the boiler directly to the rearchamber; and piping leading from thefront chamber to deliver thesuperheated steam from the case for use.

6. A steam superheater for boilers, comprising a hollow case embodyingflat front and rear verticalwalls disposed in spaced, parallel relation;a flat division plate in said case disposed parallel with said walls andspaced therefrom to form separate front and rear vertical steam conduitsor chambers, said chambers having a communication passage between themat the margin of the plate; an aperturecl boss projecting outward fromone wall of the case; a boss projecting laterally from the divisionplate through one of said chambers into abut-ting relation with thefirstanamed boss and having an aperture in registration with theaperture therein; piping communicating with said bosses for supplyingsaturated steam therethrough from the boiler directly to the otherchamber; andpiping leading from the first-named chamber to deliver thesuperheated steam from the case for use.

In testimony whereof we affix our signatures.

LUIS GODARD. 'rnonono LARREY.

